Turbine.



B. I. BRADDOGK.

TURBINE. APPLICATION FILED JUNE 8, 1908.

Patented Feb. 2, 1909.

3 ZYiiizeazsas. 76

uiutrnn STATES PATENT ornuon.

- EDWARD LBRADDOOTQOF WINCHESTER, MASSACHUSETTS,ASSIGNOItTO BRADDOOK MOTIVE POWER COMPANY, OF. BOSTON; MASSACHUSETTS, A CORPORATION OF MAINE.

Q TURBINE Nosernmo.

To allwhom it may concern:

Be it known that I, EDWARD I. Bm nnoox,

a citizen of the United States, residing in Winchester, county of Middlesex, and State of Massachusetts, have invented an Improvement in Turbine-Engines, of which the fol' lowing description, in connection with the.

accompanying drawings, is a specification,

arts. r

This invention relates to a turbine engine or motor of that classin, which a rotatable.

wheel having eripheralblades or vanes is tur great speed a minimum fiuidpressure, and in which the expansion of the fluid is utilized in addition to the velocity ,orimorder to pass through the throator opening to the next precedingblade against a solid .part of which it is projected ordirected.

These and other features of this invention will be pointed out in the claims atv the end of this specification.

Figure 1. is a front, elevationof a turbine.

engine or motor embodying this invention. Fig. 2, a side elevation of the engine shown in Fig. 1. Fig. 3, a partial section and elevation of the engine shown inFig. 1. Fig. 4, a detail in section tobe referred to taken on the line 44, Fig.3, and Fig. 5, a developed view of a portionofone of the wheels.

Referring to the drawings a represents a casing within which is located a series of piston wheels 1) fast on a shaft c, journaled in suitablebearings d.

Each piston wheel bis made in two parts or halves comprising annular body portions 10, 12, having annular flanges 13, 14, from which extend laterally Ipiston blades or vanes 15, 16, said parts or alves being'suitably secured together as bybolts or rods 17, so that the flanges 13, 14 form an annular chamber which is se arated into a series of pockets 18, by the lades or vanes 15, 16.

V g Specification of Letters.latent. I Application filed June 6,1908. Serial No. 437,103.

like letters on the drawings representinglike i empgloyedand as for its object to provide a ine engine or motor of the class referred to, which is capable offbeing rotated at a Patented Feb. 2, 1909.

The pockets ,18 are connected together to form a continuousbut irregular passage for the steam or other fiuid about the piston wheel by f .n eansof" two sets of throatsor {openings/20, 21, which are formed in the blades 1 5, 16, so. that the throats are located on {one side of the circumferential centerof the wheel and the throats21 on the other sideof said. center. This result may vane substantially rectangular in shape, with thevertical portion or member of substantially the de pth of the flange to which it is attached, and witha top horizontal portion or. member of substantially the width of the spacebetween ,the fianges 13, 14, the rectangular blade 15 cooperating with the flange, 14 and the body'fportion 12 to form the throatf20, and the rectangular blade 16 portion 10 toform the throat-21 (see Figs. 3 and 4) As aresult of this construction, the steam or other fluid admitted into the casing a through an inlet pipe (see Fig. 2), strikes against the vertical and'horizontal members ofo'ne piston blade or vane, as 15, expands in the pocket 18 formed by this blade and the. next succeeding one, and then passes through the narrow throat 20 on one side of impacts against the next preceding blade or vane 16 by' which it is arrested in its course, and after expanding in the pocket into which it has just entered, iscaused to pass to the other side of .the circumferential center and'through the narrow throat 21 into the next Y preceding pocket, .etc. until it reaches theexhaust port 31, which is shown as located near the bottom of the casing a where it communicates with a chamber 32 common to all the exhaust ports, said chamberha vingan outlet pipe 33.

L Theicasi n'g a, .may also have connected with it at its opposite side, a second inlet pipe 34, which is designed to be used to admit steam or other fluid into the annular chambers when it is desired to efiect a reverse rotation of the piston wheel and its shaft. The pipes 30, 34 in practice will be provided with suitable valves (not shown), by means of which one of said pipes may be closed when the other is open.

The engine is provided with means for preventing oil or other lubricant from getting into the exhaust steam or fluid, which may be accomplished by .making each blade or.

cooperating with thefiange 13 and the body.

the circumferential center of the wheel, and

provided with an outlet be accomplished as herein shown, by providing the endmost or outside piston wheels with a center disk or plate 35 and with an annular flange 36, which latter projects into an annular chamber 37 formed in the casing a and communicating with an oil well 38 pipe 39 having a valve 40, said outlet. pipe being designed in practice to be connected with a pump (not shown), which is employed to deliver the oil to the bearings through the pipes 41. The casing a may be made in two parts, which are secured together by bolts 42. The course of the steam or other fluid is indicated by the arrows in Figs. 4 and 5, and by reference to these figures, it will be seen that the steam passing through the throat in one blade or vane on one side of the circumferential center of the piston wheel strikes against the next preceding blade and passes through the throat or that blade on the other side of the circumferential center 01' the piston wheel, and that opportunity is afl'orded for the steam or other fluid to expand in the pockets formed by the blades or vanes, whereby the expansion as well as the impact of the steam is utidzed.

In practice, each part or half of the piston wheel may be cast in one piece with the blades or vanes integral therewith and the said parts fitted together with the piston blades on one half extended between the blades on the other half, which enables the turbine engine or motor to be made at a minimum cost. The oil supplied to the bearings works along the shaft 0 until it meets the disk 35 on which it is carried by centrifugal action to the flange 36 and thrown into the chamber 37.

Claims.

1. In a turbine engine or motor, in combi nation, an inclosing casing, a rotatable wheel within said casing comprising a body portion having side flanges, which cooperate with the casing to form an annular fluid chamber, a fluid inlet for said casing, a fluid outlet for said casing, and a plurality of blades or vanes attached to said wheel within said annular chamber and extended transversely of the same in staggered relation to form pockets between adjacent blades, said blades having throats or openings below their upper edges, and adjacent blades having their throats located on opposite sides of the circumierential center of the wheel, substantially as described.

2. In a turbine engine or motor, a wheel provided with circumferential flanges, and with blades or vanes extended transversely of the circumference from each flange toward the other in staggered relation, and having throats or openings below their upper edges and on opposite sides of the circuinlerential center of the wheel, substantially as described.

3. In a turbine engine or motor, a piston wheel provided on its circumference with blades or vanes separated from one another and comprising upright members and substantially horizontal members extended beyond said upright members to form threats 1' openings below the upper edges oi said horizontal members, substantially as described.

l. In a turbine engine or motor, a piston wheel provided with circum'lerential flanges and with blades or vanes extended tn: sversely of said circumference to term pockets and having threats or openings below their upper edges and on opposite sides ot the circumferential center to connect said pockets, substantially as described.

5. In a turbine engine or motor, a piston wheel composed of two parts or halves, each comprising a body portion, a eircuin'lercntial flange, a plurality of transversely extended blades or vanes having openings below their upper edges, and means to secure said parts or halves together with their blades in staggered relation and the openings in one set of blades out of line with the o Jenings in the othersct of blades, substantiall *as described.

6. In a turbine engine or motor, a piston wheel provided with circumferential flanges and with radial blades or vanes extended transversely of said circumference to term pockets and having in them threats or openings below their upper edges to connect said pockets, substantially as described.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD I. BRADDOCK.

Witnesses Jns. H. CHURCHILL, J. MURPHY. 

